There's a closed pull request on the void-packages repository

SDL2_ttf: move cmake to -devel
https://github.com/void-linux/void-packages/pull/49644

Description:
cnake files belong in devel subpackage, not the main one.

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (ARCH-LIBC)